1
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Liu H, Liang ZF, Liu HJ, Liao JX, Zhong LJ, Tu YH, Zhang QJ, Xiong B, Sun JS. ortho-Methoxycarbonylethynylphenyl Thioglycosides (MCEPTs): Versatile Glycosyl Donors Enabled by Electron-Withdrawing Substituents and Catalyzed by Gold(I) or Cu(II) Complexes. J Am Chem Soc 2023; 145:3682-3695. [PMID: 36727591 DOI: 10.1021/jacs.2c13018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
With easily accessible and operator-friendly reagents, shelf-stable ortho-methoxycarbonylethynylphenyl thioglycosides were efficiently prepared. Based on these MCEPT glycoside donors, a novel glycosylation protocol featuring mild and catalytic promotion conditions with Au(I) or Cu(II) complexes, expanded substrate scope encompassing challenging donors and acceptors and clinically used pharmaceuticals, and versatility in various strategies for highly efficient synthesis of glycosides has been established. The practicality of the MCEPT glycosylation protocol was fully exhibited by highly efficient and scalable synthesis of surface polysaccharide subunits of Acinetobacter baumannii via latent-active, reagent-controlled divergent orthogonal one-pot and orthogonal one-pot strategies. The underlying reaction mechanism was investigated systematically through control reactions, leading to the isolation and characterization of the vital catalyst species in MCEPT glycosylation, the benzothiophen-3-yl-gold(I) complex. Based on the results obtained both from control reactions and from studies leading to the glycosylation protocol establishment, an operative mechanism was proposed and the effect of the vital catalyst species reactivity on the results of metal-catalyzed alkyne-containing donor-involved glycosylation was disclosed. Moreover, the mechanism for C-glycosylation side product formation from ortho-(substituted)ethynylphenyl thioglycoside donors with electron-donating substituents was also illuminated.
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Affiliation(s)
- Hui Liu
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Zhi-Fen Liang
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Han-Jian Liu
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Jin-Xi Liao
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Li-Jun Zhong
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Yuan-Hong Tu
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Qing-Ju Zhang
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Bin Xiong
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
| | - Jian-Song Sun
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China.,School of Life Science and Health Engineering, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, China
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2
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Teschers CS, Gilmour R. Fluorine-Directed Automated Mannoside Assembly. Angew Chem Int Ed Engl 2023; 62:e202213304. [PMID: 36331042 PMCID: PMC10108063 DOI: 10.1002/anie.202213304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 11/02/2022] [Accepted: 11/04/2022] [Indexed: 11/06/2022]
Abstract
Automated glycan assembly (AGA) on solid support has become invaluable in reconciling the biological importance of complex carbohydrates with the persistent challenges associated with reproducible synthesis. Whilst AGA platforms have transformed the construction of many natural sugars, validation in the construction of well-defined (site-selectively modified) glycomimetics is in its infancy. Motivated by the importance of fluorination in drug discovery, the biomedical prominence of 2-fluoro sugars and the remarkable selectivities observed in fluorine-directed glycosylation, fluorine-directed automated glycan assembly (FDAGA) is disclosed. This strategy leverages the fluorine atom for stereocontrolled glycosylation on solid support, thereby eliminating the reliance on O-based directing groups. The logical design of C2-fluorinated mannose building blocks, and their application in the fully (α-)stereocontrolled automated assembly of linear and branched fluorinated oligomannosides, is disclosed. This operationally simple strategy can be integrated into existing AGA and post-AGA protocols to augment the scope of programmed carbohydrate synthesis.
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Affiliation(s)
- Charlotte S Teschers
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstr. 36, 48149, Münster, Germany
| | - Ryan Gilmour
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstr. 36, 48149, Münster, Germany
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3
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Xu H, Schaugaard RN, Li J, Schlegel HB, Nguyen HM. Stereoselective 1,2- cis Furanosylations Catalyzed by Phenanthroline. J Am Chem Soc 2022; 144:7441-7456. [PMID: 35413194 DOI: 10.1021/jacs.2c02063] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Stereoselective formation of the 1,2-cis furanosidic linkage, a motif of many biologically relevant oligosaccharides and polysaccharides, remains an important synthetic challenge. We herein report a new stereoselective 1,2-cis furanosylation method promoted by phenanthroline catalysts under mild and operationally simple conditions. NMR experiments and density functional theory calculations support an associative mechanism in which the rate-determining step occurs from an inverted displacement of the faster-reacting phenanthrolinium ion intermediate with an alcohol nucleophile. The phenanthroline catalysis system is applicable to a number of furanosyl bromide donors to provide the challenging 1,2-cis substitution products in good yield with high anomeric selectivities. While arabinofuranosyl bromide provides β-1,2-cis products, xylo- and ribofuranosyl bromides favor α-1,2-cis products.
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Affiliation(s)
- Hengfu Xu
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Richard N Schaugaard
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Jiayi Li
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - H Bernhard Schlegel
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Hien M Nguyen
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
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4
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Marino C, Bordoni AV. Deoxy sugars. General methods for carbohydrate deoxygenation and glycosidation. Org Biomol Chem 2022; 20:934-962. [PMID: 35014646 DOI: 10.1039/d1ob02001c] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Deoxy sugars represent an important class of carbohydrates, present in a large number of biomolecules involved in multiple biological processes. In various antibiotics, antimicrobials, and therapeutic agents the presence of deoxygenated units has been recognized as responsible for biological roles, such as adhesion or great affinity to receptors, or improved efficacy. The characterization of glycosidases and glycosyltranferases requires substrates, inhibitors and analogous compounds. Deoxygenated sugars are useful for carrying out specific studies for these enzymes. Deoxy sugars, analogs of natural substrates, may behave as substrates or inhibitors, or may not interact with the enzyme. They are also important for glycodiversification studies of bioactive natural products and glycobiological processes, which could contribute to discovering new therapeutic agents with greater efficacy by modification or replacement of sugar units. Deoxygenation of carbohydrates is, thus, of great interest and numerous efforts have been dedicated to the development of methods for the reduction of sugar hydroxyl groups. Given that carbohydrates are the most important renewable chemicals and are more oxidized than fossil raw materials, it is also important to have methods to selectively remove oxygen from certain atoms of these renewable raw materials. The different methods for removal of OH groups of carbohydrates and representative or recent applications of them are presented in this chapter. Glycosidic bonds in general, and 2-deoxy glycosidic linkages, are included. It is not the scope of this survey to cover all reports for each specific technique.
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Affiliation(s)
- Carla Marino
- CIHIDECAR, Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, 1428 Buenos Aires, Argentina.
| | - Andrea V Bordoni
- Gerencia Química & Instituto de Nanociencia y Nanotecnología - Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, CONICET, Av. Gral. Paz 1499, B1650KNA San Martín, Buenos Aires, Argentina
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5
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Zhang M, Chen HW, Liu QQ, Gao FT, Li YX, Hu XG, Yu CY. De Novo Synthesis of Orthogonally-Protected C2-Fluoro Digitoxoses and Cymaroses: Development and Application for the Synthesis of Fluorinated Digoxin. J Org Chem 2021; 87:1272-1284. [PMID: 34964642 DOI: 10.1021/acs.joc.1c02592] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Inspired by Roush's pioneering work on rare sugars, we have developed a scalable, stereoselective, de novo synthesis of orthogonally protected C2-fluoro digitoxose and cymarose, utilizing Sharpless kinetic resolution and organocatalytic fluorination as key steps. The utility of this strategy is demonstrated by the synthesis of a fluorinated analogue of digoxin, which indicates the fluorine on the sugar ring may have a significant impact on biological activity.
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Affiliation(s)
- Ming Zhang
- National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, China.,Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Hong-Wei Chen
- National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, China
| | - Qing-Quan Liu
- National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, China
| | - Feng-Teng Gao
- National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, China
| | - Yi-Xian Li
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiang-Guo Hu
- National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, China
| | - Chu-Yi Yu
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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6
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Mondal R, Agbaria M, Nairoukh Z. Fluorinated Rings: Conformation and Application. Chemistry 2021; 27:7193-7213. [PMID: 33512034 DOI: 10.1002/chem.202005425] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Indexed: 12/16/2022]
Abstract
The introduction of fluorine atoms into molecules and materials across many fields of academic and industrial research is now commonplace, owing to their unique properties. A particularly interesting feature is the impact of fluorine substitution on the relative orientation of a C-F bond when incorporated into organic molecules. In this Review, we will be discussing the conformational behavior of fluorinated aliphatic carbo- and heterocyclic systems. The conformational preference of each system is associated with various interactions introduced by fluorine substitution such as charge-dipole, dipole-dipole, and hyperconjugative interactions. The contribution of each interaction on the stabilization of the fluorinated alicyclic system, which manifests itself in low conformations, will be discussed in detail. The novelty of this feature will be demonstrated by presenting the most recent applications.
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Affiliation(s)
- Rajarshi Mondal
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, 9190401, Israel
| | - Mohamed Agbaria
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, 9190401, Israel
| | - Zackaria Nairoukh
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, 9190401, Israel
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7
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DeMent PM, Liu C, Wakpal J, Schaugaard RN, Schlegel HB, Nguyen HM. Phenanthroline-Catalyzed Stereoselective Formation of α-1,2- cis 2-Deoxy-2-Fluoro Glycosides. ACS Catal 2021; 11:2108-2120. [PMID: 34336371 DOI: 10.1021/acscatal.0c04381] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Phenanthroline is a heterocyclic aromatic organic compound and commonly used in coordination chemistry acting as a bidentate ligand. The C4 and C7 positions of phenanthroline can often be substituted to change the binding capabilities of the ligand. Recently, there has been a push in the field of chemistry to create environmental-friendly chemical methodologies by utilizing catalysts and minimizing solvent. Herein, we have illustrated how, at high concentrations with minimal use of solvent, the C4 and C7 positions of phenanthroline can be tuned to develop an efficient and stereoselective catalyst for the formation of α-1,2-cis-fluorinated glycosides. By activating 2-deoxy-2-fluoro glycosyl halides with phenanthroline-based catalysts, we have been able to achieve glycosylations with high levels of α-selectivities and moderate to high yields. The catalytic system has been applied to several glycosyl halide electrophiles with a range of glycosyl nucleophilic acceptors. The proposed mechanism for this catalytic glycosylation system has been investigated by density functional theory calculations, indicating that the double SN2 displacement pathways with phenanthroline catalysts have lower barriers and ensure stereoselective formation of α-1,2-cis-2-fluoro glycosides.
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Affiliation(s)
- Paul M. DeMent
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Chenlu Liu
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Joseph Wakpal
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Richard N. Schaugaard
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - H. Bernhard Schlegel
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Hien M. Nguyen
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
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8
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Kieser TJ, Santschi N, Nowack L, Axer A, Kehr G, Albrecht S, Gilmour R. Total Chemical Syntheses of the GM 3 and F-GM 3 Ganglioside Epitopes and Comparative Pre-Clinical Evaluation for Non-Invasive Imaging of Oligodendrocyte Differentiation. ACS Chem Neurosci 2020; 11:2129-2136. [PMID: 32559361 DOI: 10.1021/acschemneuro.0c00319] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Gangliosides are intimately involved in a plenum of (neuro)inflammatory processes, yet progress in establishing structure-function interplay is frequently hindered by the availability of well-defined glycostructures. Motivated by the ubiquity of the ganglioside GM3 in chemical neurology, and in particular by its conspicuous presence in myelin, the GM3 epitope was examined with a view to preclinical validation as a tracer. The suitability of this scaffold for the noninvasive imaging of oligodendrocyte differentiation in Multiple sclerosis is disclosed. The stereocontrolled synthesis of a site-selectively fluorinated analogue (F-GM3) is also disclosed to enable a comparative analysis in oligodendrocyte (OL) differentiation. Whereas the native epitope caused a decrease in the viability in a dose-dependent manner, the addition of distinct F-GM3 concentrations over 48 h had no impact on the OL viability. This is likely a consequence of the enhanced hydrolytic stability imparted by the fluorination and highlights the potential of fluorinated glycostructures in the field of molecular imaging. Given the predominant expression of GM3 in oligodendrocytes and the capacity of GM3 to interact with myelin-associated proteins, this preclinical evaluation has revealed F-GM3 to be an intriguing candidate for neurological imaging.
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Affiliation(s)
- Tobias J. Kieser
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, Münster 48149, Germany
| | - Nico Santschi
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, Münster 48149, Germany
| | - Luise Nowack
- Institute for Neuropathology, University Hospital Münster, Pottkamp 2, Münster 48149, Germany
| | - Alexander Axer
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, Münster 48149, Germany
| | - Gerald Kehr
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, Münster 48149, Germany
| | - Stefanie Albrecht
- Institute for Neuropathology, University Hospital Münster, Pottkamp 2, Münster 48149, Germany
| | - Ryan Gilmour
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, Münster 48149, Germany
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9
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Nairoukh Z, Strieth-Kalthoff F, Bergander K, Glorius F. Understanding the Conformational Behavior of Fluorinated Piperidines: The Origin of the Axial-F Preference. Chemistry 2020; 26:6141-6146. [PMID: 32270524 PMCID: PMC7317880 DOI: 10.1002/chem.202001355] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/07/2020] [Indexed: 12/19/2022]
Abstract
Gaining an understanding of the conformational behavior of fluorinated compounds would allow for expansion of the current molecular design toolbox. In order to facilitate drug discovery efforts, a systematic survey of a series of diversely substituted and protected fluorinated piperidine derivatives has been carried out using NMR spectroscopy. Computational investigations reveal that, in addition to established delocalization forces such as charge–dipole interactions and hyperconjugation, solvation and solvent polarity play a major role. This work codifies a new design principle for conformationally rigid molecular scaffolds.
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Affiliation(s)
- Zackaria Nairoukh
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Felix Strieth-Kalthoff
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Klaus Bergander
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Frank Glorius
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
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10
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Mayfield AB, Metternich JB, Trotta AH, Jacobsen EN. Stereospecific Furanosylations Catalyzed by Bis-thiourea Hydrogen-Bond Donors. J Am Chem Soc 2020; 142:4061-4069. [PMID: 32013410 DOI: 10.1021/jacs.0c00335] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We report a new method for stereoselective O-furanosylation reactions promoted by a precisely tailored bis-thiourea hydrogen-bond-donor catalyst. Furanosyl donors outfitted with an anomeric dialkylphosphate leaving group undergo substitution with high anomeric selectivity, providing access to the challenging 1,2-cis substitution pattern with a range of alcohol acceptors. A variety of stereochemically distinct, benzyl-protected glycosyl donors were engaged successfully as substrates. Mechanistic studies support a stereospecific mechanism in which rate-determining substitution occurs from a catalyst-donor resting-state complex.
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Affiliation(s)
- Andrew B Mayfield
- Department of Chemistry & Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Jan B Metternich
- Department of Chemistry & Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Adam H Trotta
- Department of Chemistry & Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Eric N Jacobsen
- Department of Chemistry & Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
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11
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Lebedel L, Ardá A, Martin A, Désiré J, Mingot A, Aufiero M, Aiguabella Font N, Gilmour R, Jiménez‐Barbero J, Blériot Y, Thibaudeau S. Structural and Computational Analysis of 2‐Halogeno‐Glycosyl Cations in the Presence of a Superacid: An Expansive Platform. Angew Chem Int Ed Engl 2019; 58:13758-13762. [DOI: 10.1002/anie.201907001] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 06/28/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Ludivine Lebedel
- IC2MP UMR CNRS 7285, Equipe “Synthèse Organique”Université de Poitiers 4 rue Michel Brunet 86073 Poitiers cedex 9 France
| | - Ana Ardá
- CIC bioGUNE Parque technologico de Bizkaia, Edif. 801A-1° Derio-Bizkaia 48160 Spain
- Ikerbasque, Basque Foundation for Science Maria Lopez de Haro 3 48013 Bilbao Spain
| | - Amélie Martin
- IC2MP UMR CNRS 7285, Equipe “Synthèse Organique”Université de Poitiers 4 rue Michel Brunet 86073 Poitiers cedex 9 France
| | - Jérôme Désiré
- IC2MP UMR CNRS 7285, Equipe “Synthèse Organique”Université de Poitiers 4 rue Michel Brunet 86073 Poitiers cedex 9 France
| | - Agnès Mingot
- IC2MP UMR CNRS 7285, Equipe “Synthèse Organique”Université de Poitiers 4 rue Michel Brunet 86073 Poitiers cedex 9 France
| | - Marialuisa Aufiero
- Organisch Chemisches InstitutWestfälische Wilhelms Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Nuria Aiguabella Font
- Organisch Chemisches InstitutWestfälische Wilhelms Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Ryan Gilmour
- Organisch Chemisches InstitutWestfälische Wilhelms Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Jesus Jiménez‐Barbero
- CIC bioGUNE Parque technologico de Bizkaia, Edif. 801A-1° Derio-Bizkaia 48160 Spain
- Ikerbasque, Basque Foundation for Science Maria Lopez de Haro 3 48013 Bilbao Spain
| | - Yves Blériot
- IC2MP UMR CNRS 7285, Equipe “Synthèse Organique”Université de Poitiers 4 rue Michel Brunet 86073 Poitiers cedex 9 France
| | - Sébastien Thibaudeau
- IC2MP UMR CNRS 7285, Equipe “Synthèse Organique”Université de Poitiers 4 rue Michel Brunet 86073 Poitiers cedex 9 France
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12
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Lebedel L, Ardá A, Martin A, Désiré J, Mingot A, Aufiero M, Aiguabella Font N, Gilmour R, Jiménez‐Barbero J, Blériot Y, Thibaudeau S. Structural and Computational Analysis of 2‐Halogeno‐Glycosyl Cations in the Presence of a Superacid: An Expansive Platform. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ludivine Lebedel
- IC2MP UMR CNRS 7285, Equipe “Synthèse Organique”Université de Poitiers 4 rue Michel Brunet 86073 Poitiers cedex 9 France
| | - Ana Ardá
- CIC bioGUNE Parque technologico de Bizkaia, Edif. 801A-1° Derio-Bizkaia 48160 Spain
- Ikerbasque, Basque Foundation for Science Maria Lopez de Haro 3 48013 Bilbao Spain
| | - Amélie Martin
- IC2MP UMR CNRS 7285, Equipe “Synthèse Organique”Université de Poitiers 4 rue Michel Brunet 86073 Poitiers cedex 9 France
| | - Jérôme Désiré
- IC2MP UMR CNRS 7285, Equipe “Synthèse Organique”Université de Poitiers 4 rue Michel Brunet 86073 Poitiers cedex 9 France
| | - Agnès Mingot
- IC2MP UMR CNRS 7285, Equipe “Synthèse Organique”Université de Poitiers 4 rue Michel Brunet 86073 Poitiers cedex 9 France
| | - Marialuisa Aufiero
- Organisch Chemisches InstitutWestfälische Wilhelms Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Nuria Aiguabella Font
- Organisch Chemisches InstitutWestfälische Wilhelms Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Ryan Gilmour
- Organisch Chemisches InstitutWestfälische Wilhelms Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Jesus Jiménez‐Barbero
- CIC bioGUNE Parque technologico de Bizkaia, Edif. 801A-1° Derio-Bizkaia 48160 Spain
- Ikerbasque, Basque Foundation for Science Maria Lopez de Haro 3 48013 Bilbao Spain
| | - Yves Blériot
- IC2MP UMR CNRS 7285, Equipe “Synthèse Organique”Université de Poitiers 4 rue Michel Brunet 86073 Poitiers cedex 9 France
| | - Sébastien Thibaudeau
- IC2MP UMR CNRS 7285, Equipe “Synthèse Organique”Université de Poitiers 4 rue Michel Brunet 86073 Poitiers cedex 9 France
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13
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Kurfiřt M, Červenková Št’astná L, Dračínský M, Müllerová M, Hamala V, Cuřínová P, Karban J. Stereoselectivity in Glycosylation with Deoxofluorinated Glucosazide and Galactosazide Thiodonors. J Org Chem 2019; 84:6405-6431. [DOI: 10.1021/acs.joc.9b00705] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Martin Kurfiřt
- Institute of Chemical Process Fundamentals of the CAS, v. v. i, Rozvojová 135, 16502 Praha, Czech Republic
| | - Lucie Červenková Št’astná
- Institute of Chemical Process Fundamentals of the CAS, v. v. i, Rozvojová 135, 16502 Praha, Czech Republic
| | - Martin Dračínský
- Institute of Organic Chemistry and Biochemistry of the CAS, Flemingovo náměstí 542/2, 16610 Praha, Czech Republic
| | - Monika Müllerová
- Institute of Chemical Process Fundamentals of the CAS, v. v. i, Rozvojová 135, 16502 Praha, Czech Republic
| | - Vojtěch Hamala
- Institute of Chemical Process Fundamentals of the CAS, v. v. i, Rozvojová 135, 16502 Praha, Czech Republic
| | - Petra Cuřínová
- Institute of Chemical Process Fundamentals of the CAS, v. v. i, Rozvojová 135, 16502 Praha, Czech Republic
| | - Jindřich Karban
- Institute of Chemical Process Fundamentals of the CAS, v. v. i, Rozvojová 135, 16502 Praha, Czech Republic
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Hayashi T, Kehr G, Bergander K, Gilmour R. Stereospecific α‐Sialylation by Site‐Selective Fluorination. Angew Chem Int Ed Engl 2019; 58:3814-3818. [DOI: 10.1002/anie.201812963] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 12/21/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Taiki Hayashi
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Gerald Kehr
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Klaus Bergander
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Ryan Gilmour
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
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15
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Hayashi T, Kehr G, Bergander K, Gilmour R. Stereospecific α‐Sialylation by Site‐Selective Fluorination. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812963] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Taiki Hayashi
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Gerald Kehr
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Klaus Bergander
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
| | - Ryan Gilmour
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstrasse 40 48149 Münster Germany
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16
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Mestre J, Collado D, Benito-Alifonso D, Rodríguez MA, Matheu MI, Díaz Y, Castillón S, Boutureira O. Highly reactive 2-deoxy-2-iodo-d- allo and d- gulo pyranosyl sulfoxide donors ensure β-stereoselective glycosylations with steroidal aglycones. RSC Adv 2018; 8:30076-30079. [PMID: 35546863 PMCID: PMC9085402 DOI: 10.1039/c8ra06619a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 08/11/2018] [Indexed: 12/31/2022] Open
Abstract
The preparation of well-defined d-xylo and d-ribo glycosides represents a synthetic challenge due to the limited configurational availability of starting materials and the laborious synthesis of homogeneous 2-deoxy-β-glycosidic linkages, in particular that of the sugar-steroid motif, which represents the “stereoselective determining step” of the overall synthesis. Herein we describe the use of 2-deoxy-2-iodo-glycopyranosyl sulfoxides accessible from widely available d-xylose and d-ribose monosaccharides as privileged glycosyl donors that permit activation at very low temperature. This ensures a precise kinetic control for a complete 1,2-trans stereoselective glycosylation of particularly challenging steroidal aglycones. Highly stereoselective synthesis of challenging steroidal 2-deoxy-β-glycosides with d-xylo and d-ribo configurations enabled by low temperature activation of 2-deoxy-2-iodoglycopyranosyl sulfoxides.![]()
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Affiliation(s)
- Jordi Mestre
- Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili C/Marcel·lí Domingo 1 43007 Tarragona Spain
| | - David Collado
- Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili C/Marcel·lí Domingo 1 43007 Tarragona Spain
| | - David Benito-Alifonso
- Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili C/Marcel·lí Domingo 1 43007 Tarragona Spain
| | - Miguel A Rodríguez
- Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili C/Marcel·lí Domingo 1 43007 Tarragona Spain
| | - M Isabel Matheu
- Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili C/Marcel·lí Domingo 1 43007 Tarragona Spain
| | - Yolanda Díaz
- Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili C/Marcel·lí Domingo 1 43007 Tarragona Spain
| | - Sergio Castillón
- Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili C/Marcel·lí Domingo 1 43007 Tarragona Spain
| | - Omar Boutureira
- Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili C/Marcel·lí Domingo 1 43007 Tarragona Spain
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17
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Sadurní A, Gilmour R. Stereocontrolled Synthesis of 2-Fluorinated C-Glycosides. European J Org Chem 2018; 2018:3684-3687. [PMID: 30147438 PMCID: PMC6099233 DOI: 10.1002/ejoc.201800618] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Indexed: 11/22/2022]
Abstract
A systematic study of the addition of C-based nucleophiles to fluorinated lactones based on 2-deoxy-2-fluoro-d-pyranoses is disclosed. This high yielding, α-selective process was found to be independent on the nature or configuration [(R)-C(sp3)-F, (S)-C(sp3)-F] of the substituent at C2. Representative, fluorinated analogues of Trehalose, Carminic acid, and the spirocyclic cores of Tofogliflozin and Papulacandin D are also reported. These glycomimics constitute a valuable series of 19F NMR active probes for application in structural biology.
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Affiliation(s)
- Anna Sadurní
- Organisch‐Chemisches InstitutWestfälische Wilhelms‐Universität MünsterCorrensstraße 4048149MünsterGermany
| | - Ryan Gilmour
- Organisch‐Chemisches InstitutWestfälische Wilhelms‐Universität MünsterCorrensstraße 4048149MünsterGermany
- Excellence Cluster EXC 1003Cells in MotionGermany
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18
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Aufiero M, Gilmour R. Informing Molecular Design by Stereoelectronic Theory: The Fluorine Gauche Effect in Catalysis. Acc Chem Res 2018; 51:1701-1710. [PMID: 29894155 DOI: 10.1021/acs.accounts.8b00192] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The axioms of stereoelectronic theory constitute an atlas to navigate the contours of molecular space. All too rarely lauded, the advent and development of stereoelectronic theory has been one of organic chemistry's greatest triumphs. Inevitably, however, in the absence of a comprehensive treatise, many of the field's pioneers do not receive the veneration that they merit. Rather their legacies are the stereoelectronic pillars that persist in teaching and research. This ubiquity continues to afford practitioners of organic chemistry with an abundance of opportunities for creative endeavor in reaction design, in conceiving novel activation modes, in preorganizing intermediates, or in stabilizing productive transition states and products. Antipodal to steric governance, which mitigates destabilizing nonbonding interactions, stereoelectronic control allows well-defined, often complementary, conformations to be populated. Indeed, the prevalence of stabilizing hyperconjugative interactions in biosynthetic processes renders this approach to molecular preorganization decidedly biomimetic and, by extension, expansive. In this Account, the evolution and application of a simple donor-acceptor model based on the fluorine gauche effect is delineated. Founded on reinforcing hyperconjugative interactions involving C(sp3)-H bonding orbitals and C(sp3)-X antibonding orbitals [σC-H → σC-X*], this general stratagem has been used in conjunction with an array of secondary noncovalent interactions to achieve acyclic conformational control (ACC) in structures of interest. These secondary effects range from 1,3-allylic strain (A1,3) through to electrostatic charge-dipole and cation-π interactions. Synergy between these interactions ensures that rotation about strategic C(sp3)-C(sp3) bonds is subject to the stereoelectronic requirement for antiperiplanarity (180°). Logically, in a generic [X-CH2-CH2-Y] system (X, Y = electron withdrawing groups) conformations in which the two C(sp3)-X bonds are synclinal (i.e., gauche) are significantly populated. As such, simple donor-acceptor models are didactically and predictively powerful in achieving topological preorganization. In the case of the gauche effect, the low steric demand of fluorine ensures that the remaining substituents at the C(sp3) hybridized center are placed in a predictable area of molecular space: An exit vector analogy is thus appropriate. Furthermore, the intrinsic chemical stability of the C-F bond is advantageous, thus it may be considered as an inert conformational steering group: This juxtaposition of size and electronegativity renders fluorinated organic molecules unique among the organo-halogen series. Cognizant that the replacement of one fluorine atom in the difluoroethylene motif by another electron withdrawing group preserves the gauche conformation, it was reasoned that β-fluoroamines would be intriguing candidates for investigation. The burgeoning field of Lewis base catalysis, particularly via iminium ion activation, provided a timely platform from which to explore a postulated fluorine-iminium ion gauche effect. Necessarily, activation of this stereoelectronic effect requires a process of intramolecularization to generate the electron deficient neighboring group: Examples include protonation, condensation to generate iminium salts, or acylation. This process, akin to substrate binding, has obvious parallels with enzymatic catalysis, since it perturbs the conformational dynamics of the system [ synclinal-endo, antiperiplanar, synclinal-exo]. This Account details the development of conformationally predictable small molecules based on the [X-Cα-Cβ-F] motif through a logical process of molecular design and illustrates their synthetic value in enantioselective catalysis.
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Affiliation(s)
- Marialuisa Aufiero
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Ryan Gilmour
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
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19
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Kieser TJ, Santschi N, Nowack L, Kehr G, Kuhlmann T, Albrecht S, Gilmour R. Single Site Fluorination of the GM 4 Ganglioside Epitope Upregulates Oligodendrocyte Differentiation. ACS Chem Neurosci 2018; 9:1159-1165. [PMID: 29361218 DOI: 10.1021/acschemneuro.8b00002] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Relapsing multiple sclerosis is synonymous with demyelination, and thus, suppressing and or reversing this process is of paramount clinical significance. While insulating myelin sheath has a large lipid composition (ca. 70-80%), it also has a characteristically large composition of the sialosylgalactosylceramide gangliosde GM4 present. In this study, the effect of the carbohydrate epitope on oligodendrocyte differentiation is determined. While the native epitope had no impact on oligodendroglial cell viability, a single site OH → F substitution is the structural basis of a significant increase in ATP production that is optimal at 50 μg/mL. From a translational perspective, this subtle change increases the amount of MBP+ oligodendrocytes compared to the control studies and may open up novel therapeutic remyelination strategies.
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Affiliation(s)
- Tobias J. Kieser
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
- Excellence Cluster EXC 1003 “Cells in Motion”, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Nico Santschi
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
- Excellence Cluster EXC 1003 “Cells in Motion”, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Luise Nowack
- Institute for Neuropathology, University Hospital Münster, Pottkamp 2, 48149 Münster, Germany
| | - Gerald Kehr
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Tanja Kuhlmann
- Institute for Neuropathology, University Hospital Münster, Pottkamp 2, 48149 Münster, Germany
| | - Stefanie Albrecht
- Institute for Neuropathology, University Hospital Münster, Pottkamp 2, 48149 Münster, Germany
| | - Ryan Gilmour
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
- Excellence Cluster EXC 1003 “Cells in Motion”, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
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20
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Sadurní A, Kehr G, Ahlqvist M, Wernevik J, Sjögren HP, Kankkonen C, Knerr L, Gilmour R. Fluorine-Directed Glycosylation Enables the Stereocontrolled Synthesis of Selective SGLT2 Inhibitors for Type II Diabetes. Chemistry 2017; 24:2832-2836. [DOI: 10.1002/chem.201705373] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Anna Sadurní
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität Münster; Corrensstraße 40 48149 Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität Münster; Corrensstraße 40 48149 Germany
| | - Marie Ahlqvist
- DMPK, Drug Safety and Metabolism, IMED Biotech Unit; Astrazeneca; Gothenburg Sweden
| | - Johan Wernevik
- Discovery Sciences, IMED Biotech Unit; AstraZeneca; Gothenburg Sweden
| | | | - Cecilia Kankkonen
- Discovery Sciences, IMED Biotech Unit; AstraZeneca; Gothenburg Sweden
| | - Laurent Knerr
- Medicinal Chemistry, Cardiovascular and Metabolic Diseases, IMED Biotech Unit; Astrazeneca; Gothenburg Sweden
| | - Ryan Gilmour
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität Münster; Corrensstraße 40 48149 Germany
- Excellence Cluster EXC 1003, Cells in Motion; Westfälische Wilhelms-Universität Münster; Münster Germany
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21
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Probst N, Martin A, Désiré J, Mingot A, Marrot J, Blériot Y, Thibaudeau S. HF-Induced Intramolecular C-Arylation and C-Alkylation/Fluorination of 2-Aminoglycopyranoses. Org Lett 2017; 19:1040-1043. [DOI: 10.1021/acs.orglett.7b00003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Nicolas Probst
- IC2MP, UMR-CNRS
7285, Equipe Synthèse organique, Bât. B28, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Amélie Martin
- IC2MP, UMR-CNRS
7285, Equipe Synthèse organique, Bât. B28, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Jérôme Désiré
- IC2MP, UMR-CNRS
7285, Equipe Synthèse organique, Bât. B28, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Agnès Mingot
- IC2MP, UMR-CNRS
7285, Equipe Synthèse organique, Bât. B28, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Jérôme Marrot
- Institut Lavoisier
de Versailles, UMR CNRS 8180, 45 avenue
des Etats-Unis, Versailles78035 Cedex, France
| | - Yves Blériot
- IC2MP, UMR-CNRS
7285, Equipe Synthèse organique, Bât. B28, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Sébastien Thibaudeau
- IC2MP, UMR-CNRS
7285, Equipe Synthèse organique, Bât. B28, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
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